Hawzah News Agency – The commander of the faithful, Imam Ali peace be upon him says:
علَيكَ بِلُزُومِ اليَقينِ وتَجَنُّبِ الشَّكِّ، فلَيسَ للمَرءِ شَيءٌ أهْلَكَ لِدِينِهِ مِن غَلَبَةِ الشَّكِّ على يَقينِهِ.
‘You must adhere to conviction and keep away from doubt, for there is nothing more detrimental to a man’s faith than for doubt to overpower his conviction.’
Source: Ghurar al-Hikam, no. 6146